CN108010812A - A kind of main circuit conductor distribution structure of zero sequence current mutual inductor - Google Patents
A kind of main circuit conductor distribution structure of zero sequence current mutual inductor Download PDFInfo
- Publication number
- CN108010812A CN108010812A CN201711224758.3A CN201711224758A CN108010812A CN 108010812 A CN108010812 A CN 108010812A CN 201711224758 A CN201711224758 A CN 201711224758A CN 108010812 A CN108010812 A CN 108010812A
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- China
- Prior art keywords
- mutual inductor
- line terminals
- stent
- center chamber
- annular center
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/08—Terminals; Connections
Abstract
The present invention discloses a kind of main circuit conductor distribution structure of the zero sequence current mutual inductor of Aftercurrent protection circuit breaker,Insulating part is fixedly connected through mutual inductor annular center chamber and with mutual inductor from load-side,Insulating part is equipped with the cross muscle prominent to mutual inductor annular center chamber,Mutual inductor annular center chamber is separated into four equal insulating regions by cross muscle,A,B,C,The line terminals that connect of N tetra- take the shape of the letter U structure,Four wire connection terminal U-shaped bottoms are each passed through a corresponding insulating regions,And A connects line terminals and the N line terminals minute surfaces that connect are symmetrical,B connects line terminals and C connects, and line terminals minute surface is symmetrical,Four wire connection terminal U-shaped bottoms are identical through the radial section product of mutual inductor annular center chamber,It can realize that the magnetic flux that each electric current of primary circuit produces in the core is cancelled out each other,Lift the detection sensitivity and detection reliability of zero sequence current mutual inductor.
Description
Technical field
The invention belongs to the Aftercurrent protection circuit breaker in low voltage electrical apparatus technology field, is specifically the zero sequence on breaker
The distribution structure of the main circuit conductor of current transformer.
Background technology
Zero sequence current mutual inductor be by detecting the residual current of main circuit, and convert thereof into secondary circuit output electricity
Pressure, is applied indirectly on the tripping coil of residual current trip after amplifying directly or by signal, realizes that residual current is threaded off
The action of device, so as to protect whole circuit.Therefore, the accuracy of detection of residual current transformer and detection reliability are most important.
When not having earth fault, the magnetic flux produced in the core by each electric current of mutual inductor primary circuit should be able to cancel out each other,
The secondary circuit of residual current transformer should not have voltage output.
Quadrupole residual current circuit breaker is that N poles part corresponding with the neutral conductor is added on the basis of three poles, i.e., in A poles, B
N poles are added on the basis of pole, C poles.The configuration mode of mutual inductor primary circuit conducting wire is into U by the terminal bending of A, B, C, N phase
Zero sequence current mutual inductor is passed through after shape.
Referring to Fig. 1, in the structure of existing zero sequence current mutual inductor 1, the central through hole of mutual inductor 1 is equipped with four regions,
It is No. 10, No. 20, No. 30, No. 40 regions respectively, ABCN conducting wires are generally passed through the central through hole of mutual inductor by following arrangement：
The A connected components that are connected are arranged vertically at No. 10 regions of zero sequence current mutual inductor 1, and the B connected components that are connected are transversely arranged on zero-sequence current
No. 20 regions of mutual inductor, the C connected components that are connected are arranged vertically at No. 30 regions of zero sequence current mutual inductor, and the N connected components that are connected erect
Straight No. 40 regions for being arranged in zero sequence current mutual inductor.This structure is not right due to the conductor arrangement through mutual inductor central through hole
Claim and cause the presence of leakage magnetic flux, i.e., in the case where earth fault does not occur for main circuit, also can produce one in secondary returning trackside
A voltage output, in the case where output voltage is enough, it will cause the malfunction of breaker, influence whole power circuit.
The content of the invention
It is an object of the invention to provide a kind of arrangement knot of the connection component of new zero sequence current mutual inductor primary circuit
Structure, that is, provide the distribution structure of the main circuit conductor of zero sequence current mutual inductor, realize each electric current of primary circuit in the core
The magnetic flux of generation is cancelled out each other, and lifts the detection sensitivity and detection reliability of this residual current transformer.
The technical solution adopted by the present invention is：Insulating part is consolidated through mutual inductor annular center chamber and with mutual inductor from load-side
Fixed connection, insulating part are equipped with the cross muscle prominent to mutual inductor annular center chamber, and cross muscle is by mutual inductor annular center
Chamber is separated into four equal insulating regions, and the line terminals that connect of A, B, C, N tetra- take the shape of the letter U structure, four wire connection terminal U-shaped bottoms
It is each passed through a corresponding insulating regions, and A connects line terminals and the N line terminals minute surfaces that connect are symmetrical, B connects line terminals and C
The line terminals that connect minute surface is symmetrical, and four wire connection terminal U-shaped bottoms are identical through the radial section product of mutual inductor annular center chamber.
Further, transducer bracket is equipped with the enter line side of current transformer, transducer bracket has one piece and mutual inductance
The perpendicular stent U-shaped board of the central axis of device annular center chamber, the opening of stent U-shaped board towards mutual inductor, stent U-shaped board
Bottom surface protrudes stent gusset to mutual inductor direction, and stent gusset will be divided into mutual inductor region and wiring board inside stent U-shaped board
Region, is provided with rack ventilating hole, central shaft and the mutual inductor annular center chamber of rack ventilating hole on the U-shaped board bottom surface in mutual inductor region
Central shaft it is conllinear, internal diameter is equal with the internal diameter of mutual inductor annular center chamber, and insulating part and connecting terminal components both pass through stent
Through hole, insulating part is concordant with stent U-shaped board, and connecting terminal components are then stretched out after rack ventilating hole connects main circuit in enter line side.
Further, A, B, C, N tetra- connect four ends of incoming cables of line terminals end face it is concordant and highly consistent, four outlets
The end face at end is concordant and highly consistent.
The present invention has an advantageous effect in that after using above-mentioned technical proposal：The present invention can solve primary circuit conducting wire needs
The cumbersome problem of insulating tape is wrapped, there is excellent phase insulation performance, each electric current of primary circuit can be realized in iron core
The magnetic flux of middle generation is cancelled out each other, and lifts the detection sensitivity and detection reliability of zero sequence current mutual inductor, and A connects line terminals
The line terminals that connect with N minute surface is symmetrical, and the B line terminals line terminals minute surfaces that connect with C that connect are symmetrical, can reduce number of molds, reduce into
This.
Brief description of the drawings
Fig. 1 is the arrangement schematic diagram that each phase conductors of existing ABCN pass through zero sequence current mutual inductor；
Fig. 2 is a kind of distribution structure schematic diagram of the main circuit conductor of zero sequence current mutual inductor of the present invention；
Fig. 3 is the front view structure enlarged drawing of Fig. 2；
Fig. 4 is the radial cross-section of Fig. 3；
Fig. 5 is the schematic enlarged-scale view of transducer bracket in Fig. 2；
Fig. 6 is the schematic enlarged-scale view of insulating part in Fig. 2；
Fig. 7 is the schematic enlarged-scale view of Fig. 2 middle connecting terminals component 2；
In figure；1. zero sequence current mutual inductor；2. connecting terminal components；3. transducer bracket；4. insulating part；22. wire connection terminal U-shaped
Bottom；31. stent U-shaped board；32. stent gusset；33. rack ventilating hole；41. insulation board；42. cross muscle；311. mutual inductor areas
Domain；312. wiring board regions；421st, 422,423,424. insulating regions.
Embodiment
Referring to Fig. 2,3,4, the middle of zero sequence current mutual inductor 1 has mutual inductor annular center chamber, along mutual inductor annular
The axial both sides of center cavity, side are enter line sides, and opposite side is load-side.Insulating part 4 is annular from load-side through mutual inductor
Center cavity and it is fixed together with zero sequence current mutual inductor 1, connecting terminal components 2 pass through mutual inductor annular center chamber,
Connecting terminal components 2 pass through mutual inductor annular center chamber after enter line side connect major loop, load-side connect user load.Connect
By A, B, C, N, this four phase connections terminal forms line end sub-component 2, and the insulating part 4 in mutual inductor annular center chamber is by mutual inductor
Annular center chamber separates four identical insulating regions, and the line terminals that connect of A, B, C, N tetra- are each passed through a corresponding insulation layer
Domain, wherein A connect line terminals and N connects, and line terminals minute surface is symmetrical, and B connects line terminals and C connects, and line terminals minute surface is symmetrical, A phases
Wire connection terminal and C connect substantially symmetrical about its central axis arrangement of the line terminals with respect to mutual inductor annular center chamber, and B connects line terminals and N connects
Substantially symmetrical about its central axis arrangement of the line terminals with respect to mutual inductor annular center chamber.Mutual inductance is equipped with the enter line side of zero sequence current mutual inductor 1
Device stent 3, transducer bracket 3 are fixed together with zero sequence current mutual inductor 1, and connecting terminal components 2 pass through mutual inductor branch
Frame 3.
Referring to Fig. 5, transducer bracket 3 abuts zero sequence current mutual inductor 1, is made of insulating materials, has one piece and zero sequence
The perpendicular stent U-shaped board 31 of the central axis of the annular center chamber of current transformer 1, the opening of stent U-shaped board 31 is towards zero
Sequence current transformer 1, the bottom surface of stent U-shaped board 31 protrude stent gusset 32, stent gusset to 1 direction of zero sequence current mutual inductor
32 will be divided into mutual inductor region 311 and wiring board region 312 inside stent U-shaped board 31, the U-shaped board 31 in mutual inductor region 311
Rack ventilating hole 33 is provided with bottom surface, the central shaft of rack ventilating hole 33 is conllinear with the central shaft of mutual inductor annular center chamber, and stent leads to
The internal diameter in hole 33 is equal with the internal diameter of mutual inductor annular center chamber, and zero sequence current mutual inductor 1 is placed on the mutual inductor region 311
In, wiring board region 312 is used to place wiring board.Insulating part 4 and connecting terminal components 2 through mutual inductor annular center chamber is equal
Through rack ventilating hole 33, insulating part 4 is concordant with stent U-shaped board 31, and connecting terminal components 2 then stretch out after rack ventilating hole 33 into
Line side connects main circuit.
Referring to Fig. 6, insulating part 4 has one piece of insulation board 41 with the center cavity axis perpendicular of zero sequence current mutual inductor 1,
Insulation board 41 is located at the load-side of zero sequence current mutual inductor 1, is equipped with insulation board 41 prominent to mutual inductor annular center chamber
Cross muscle 42.Cross muscle 42 passes through mutual inductor annular center chamber, the orthogonal decussate texture length of cross muscle 42
The internal diameter that L1 is equal to mutual inductor annular center chamber is spent, insulating part 4 is embedded in mutual inductor annular center intracavitary by cross muscle 42, with
Mutual inductor annular center chamber is tightly fixed together.Cross muscle 42 by mutual inductor annular center chamber be separated into four it is equal
Insulating regions, be insulating regions 421,422,423,424 respectively, be that the line terminals that connect of A, B, C, N tetra- pass through mutual inductor respectively
Four insulating regions during annular center chamber.
Referring to Fig. 7 and Fig. 3, in connecting terminal components 2, the connect end of incoming cables A2 of line terminals of A are used to connect with major loop, go out
Line end A21 is user load side joint line, and the connect end of incoming cables B2 of line terminals of B are used to connect with major loop, and leading-out terminal B21 is user
Load side lug, the connect end of incoming cables C2 of line terminals of C are used to connect with major loop, and leading-out terminal C21 is user load side joint line, N
The end of incoming cables N2 for the line terminals that connect is used to connect with major loop, and leading-out terminal N21 is user load side joint line.Four end of incoming cables A2,
B2, C2, N2 end face are concordant and highly consistent, and the end face of four leading-out terminals A21, B21, C21, N21 are concordant and highly consistent.A、B、
C, the line terminals that connect of N tetra- take the shape of the letter U structure, and pass through mutual inductor annular center chamber with wire connection terminal U-shaped bottom 22, make zero sequence electric
1 ring set A, B, C, N tetra- of current transformer connects the wire connection terminal U-shaped bottoms 22 of line terminals.Distinguish four wire connection terminal U-shaped bottoms 22
Through corresponding insulating regions 421,422,423,424, and A connect line terminals wire connection terminal U-shaped bottom 22 and N phase connections
22 minute surfaces of wire connection terminal U-shaped bottom of terminal are symmetrical, line terminals that B connects the wire connection terminal U-shaped bottom 22 of line terminals and C connects
22 minute surfaces of wire connection terminal U-shaped bottom are symmetrical, and four wire connection terminal U-shaped bottoms 22 pass through the radial section of mutual inductor annular center chamber
Product is identical.A, two U-shaped side walls that B, C, N tetra- connects in line terminals are located at the enter line side of zero sequence current mutual inductor 1 respectively
And load-side.
Claims (4)
1. a kind of main circuit conductor distribution structure of zero sequence current mutual inductor, insulating part（4）It is annular from load-side through mutual inductor
Center cavity and it is fixedly connected with mutual inductor, insulating part（4）It is equipped with the cross muscle prominent to mutual inductor annular center chamber（42）,
Cross muscle（42）Mutual inductor annular center chamber is separated into four equal insulating regions, it is characterized in that：A, B, C, N tetra- connects
Line terminals take the shape of the letter U structure, four wire connection terminal U-shaped bottoms（22）It is each passed through a corresponding insulating regions, and A phase connections
Terminal and N the line terminals minute surface that connects are symmetrical, and B connects line terminals and C connects, and line terminals minute surface is symmetrical, four wire connection terminal U-shaped bottoms
Portion（22）Radial section product through mutual inductor annular center chamber is identical.
2. a kind of main circuit conductor distribution structure of zero sequence current mutual inductor according to claim 1, it is characterized in that：Mutual
The enter line side of sensor is equipped with transducer bracket（3）, transducer bracket（3）Central shaft with one piece with mutual inductor annular center chamber
The perpendicular stent U-shaped board of line（31）, stent U-shaped board（31）Opening towards mutual inductor, stent U-shaped board（31）Bottom surface to mutual
Sensor direction protrudes stent gusset（32）, stent gusset（32）By stent U-shaped board（31）Inside is divided into mutual inductor region（311）
With wiring board region（312）, in mutual inductor region（311）Stent U-shaped board（31）Rack ventilating hole is provided with bottom surface（33）, stent
Through hole（33）Central shaft it is conllinear with the central shaft of mutual inductor annular center chamber, the internal diameter phase of internal diameter and mutual inductor annular center chamber
Deng insulating part（4）And connecting terminal components（2）Both pass through rack ventilating hole（33）, insulating part（4）With stent U-shaped board（31）Concordantly,
Connecting terminal components（2）Then stretch out rack ventilating hole（33）Afterwards main circuit is connected in enter line side.
3. a kind of main circuit conductor distribution structure of zero sequence current mutual inductor according to claim 1, it is characterized in that：A、B、
C, N tetra- connect four ends of incoming cables of line terminals end face it is concordant and highly consistent, the end faces of four leading-out terminals is concordant and height one
Cause.
4. a kind of main circuit conductor distribution structure of zero sequence current mutual inductor according to claim 1, it is characterized in that：U-shaped
A, B, C, N tetra- of structure connect line terminals two U-shaped side walls respectively be located at mutual inductor enter line side and load-side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711224758.3A CN108010812A (en) | 2017-11-29 | 2017-11-29 | A kind of main circuit conductor distribution structure of zero sequence current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711224758.3A CN108010812A (en) | 2017-11-29 | 2017-11-29 | A kind of main circuit conductor distribution structure of zero sequence current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108010812A true CN108010812A (en) | 2018-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711224758.3A Pending CN108010812A (en) | 2017-11-29 | 2017-11-29 | A kind of main circuit conductor distribution structure of zero sequence current mutual inductor |
Country Status (1)
| Country | Link |
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| CN (1) | CN108010812A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493062A (en) * | 2018-05-29 | 2018-09-04 | 首瑞（天津）电气设备有限公司 | Major loop for residual current circuit breaker |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958191A (en) * | 2010-08-25 | 2011-01-26 | 江苏辉能电气有限公司 | Zero sequence current mutual inductor |
| CN203277239U (en) * | 2013-05-16 | 2013-11-06 | 天津市百利电气有限公司 | Mutual inductor bracket of intelligent-type plastic-casing breaker |
| CN204614746U (en) * | 2015-05-14 | 2015-09-02 | 上海电科电器科技有限公司 | Mutual inductor unit |
| CN205723139U (en) * | 2016-04-25 | 2016-11-23 | 浙江正泰电器股份有限公司 | Residual current detection device |
| CN205723140U (en) * | 2016-04-25 | 2016-11-23 | 浙江正泰电器股份有限公司 | Residual current detection device |
-
2017
- 2017-11-29 CN CN201711224758.3A patent/CN108010812A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958191A (en) * | 2010-08-25 | 2011-01-26 | 江苏辉能电气有限公司 | Zero sequence current mutual inductor |
| CN203277239U (en) * | 2013-05-16 | 2013-11-06 | 天津市百利电气有限公司 | Mutual inductor bracket of intelligent-type plastic-casing breaker |
| CN204614746U (en) * | 2015-05-14 | 2015-09-02 | 上海电科电器科技有限公司 | Mutual inductor unit |
| CN205723139U (en) * | 2016-04-25 | 2016-11-23 | 浙江正泰电器股份有限公司 | Residual current detection device |
| CN205723140U (en) * | 2016-04-25 | 2016-11-23 | 浙江正泰电器股份有限公司 | Residual current detection device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493062A (en) * | 2018-05-29 | 2018-09-04 | 首瑞（天津）电气设备有限公司 | Major loop for residual current circuit breaker |
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| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180508 |
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| RJ01 | Rejection of invention patent application after publication |